Senior Technical Lead C#/.NET, React & Azure/AWS Cloud Architecture

ERPMark Inc

United States

Remote

USD 124,000 - 193,000

Full time

2 days ago

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Job summary

ERPMark Inc. seeks a Senior Technical Lead to drive enterprise applications with C#, .NET, React, and cloud architectures in Azure or AWS.

You will design scalable solutions, guide distributed teams, and lead modernization efforts across hybrid environments. You will own the technical roadmap, oversee microservices and secure-by-design practices, implement CI/CD pipelines, and ensure performance and reliability.

Qualifications

12+ years of software engineering experience.
Experience in a Technical Lead or Solution Architect role.
Hands-on C#, .NET, React, and Azure or AWS.
Experience delivering large-scale enterprise applications.
Experience with Microservices, Security, and DevOps.
Experience leading hybrid modernization and cloud migration programs.
Experience working in cloud and hybrid environments.
Strong enterprise security architecture and performance optimization.
Strong technical leadership and problem-solving skills.

Responsibilities

Design and lead enterprise application architecture using C#, .NET, and React.
Develop and implement Microservices, REST APIs, and cloud-native apps.
Apply architecture and design patterns for scalable, maintainable systems.
Lead legacy modernization and cloud migration initiatives.
Design secure applications following industry standards.
Implement authentication, authorization, API security, and data protection.
Optimize performance of apps, databases, and front-ends.
Build and maintain CI/CD pipelines for automated deployment.
Lead architecture reviews and code discussions.
Troubleshoot performance, scalability, and reliability issues.
Guide teams and establish technical standards.

Skills

C# / .NET

React

JavaScript / TypeScript

Microservices architecture

Cloud architecture

DevOps practices

Security design

Architecture leadership

Tools

Azure

AWS

Docker

Kubernetes

Terraform

Job description

Senior Technical Lead – C#/.NET, React & Azure/AWS Cloud Architecture

Location: Sacramento, CA (ONSITE)
Employment Type: Contract (W2 only)
Duration: 6+ Months
Experience Required: 12 +Years

Job Overview

We are seeking an experienced Senior Technical Lead with strong expertise in C#, .NET, React, Azure/AWS, Microservices, Security, and DevOps.

The ideal candidate will be responsible for designing enterprise-level applications, defining technical architecture, leading development teams, and driving cloud migration and modernization initiatives. The candidate must have strong hands‑on development and solution architecture experience across cloud and hybrid environments.

Key Responsibilities

Design and lead enterprise application architecture using C#, .NET, and React.
Develop and implement Microservices, REST APIs, and cloud-native applications.
Apply software architecture and design patterns to build scalable and maintainable applications.
Lead legacy application modernization and cloud migration initiatives.
Design secure applications using industry security standards and best practices.
Implement authentication, authorization, API security, and data protection.
Optimize application, database, and front-end performance.
Build and maintain CI/CD pipelines for automated software deployment.
Lead technical discussions, architecture reviews, and code reviews.
Troubleshoot complex application performance, scalability, and reliability issues.
Guide development teams and establish technical standards.

Mandatory Technical Skills

Backend Development

Strong expertise in C# and .NET / .NET Core.
Enterprise API development and REST APIs.
Object‑Oriented Programming and Design Patterns.
Distributed Systems and Microservices Architecture.

Frontend Development

Strong hands‑on experience with React.
JavaScript / TypeScript.
Front‑end architecture, component design, and state management.
Front‑end performance optimization.

Cloud & Infrastructure

Hands‑on experience with Microsoft Azure or AWS.
Cloud‑native application development.
Hybrid cloud architecture and cloud migration.
Legacy application modernization (Re‑hosting, Re‑platforming, and Re‑architecting).

Security

Application and Cloud Security Architecture.
OWASP Top 10 and Secure SDLC.
OAuth2, OpenID Connect, JWT, and RBAC.
Secrets Management, Data Encryption, and Network Security.

DevOps & Automation

CI/CD Pipeline Implementation.
Infrastructure as Code (Terraform / Ansible).
Docker and Kubernetes.

Databases

Microsoft SQL Server.
NoSQL databases such as MongoDB.
Database Performance Tuning and Optimization.

Architecture & Design Patterns

Microservices and Event‑Driven Architecture.
Domain‑Driven Design (DDD).
CQRS, Saga, API Gateway, and GoF Design Patterns.
Enterprise Integration and API Design Patterns.

Performance Optimization

Application and Database Performance Optimization.
Load Testing, Performance Testing, and Application Profiling.
Monitoring and Observability using Application Insights, Prometheus, or Grafana.
Scalability and Capacity Planning.

Development Practices

Agile (Scrum / Kanban).
Git and Jira.
Automated Testing and Quality Engineering Practices.

Required Qualifications

10–12 years of overall software engineering experience.
Significant experience in a Technical Lead or Solution Architect role.
Proven hands‑on expertise in C#, .NET, React, and Azure or AWS.
Strong experience designing and delivering large‑scale enterprise applications.
Proven experience with Microservices, Security, and DevOps.
Experience leading hybrid modernization and cloud migration programs.
Experience working in cloud and hybrid‑cloud environments.
Demonstrated experience in enterprise security architecture and performance optimization.
Strong technical leadership and problem‑solving skills.